Related to #878
## Changes
How-to docs pages:
- /howto/index: home page for guides
- /howto/analytics: "How to add Google Analytics?"
- /howto/seo: "How to customize page metadata for SEO?"
- /howto/sitemap: "How to build a sitemap?"
- /howto/blog: "How to add a simple blog?"
- blog index page
- blog layout
- comments -> link to the page below
- /howto/comments: "How to add user comments?"
- /howto/markdown: "How to add markdown-based content pages?"
- /howto/drd: "How to create data-rich documents with charts and tables?"
* [#858,site][xl]: add Examples to the Navbar, rename gallery to showcases, remove examples from showcases, move github stars to the navbar, add view on github button to the hero section, reduce padding on buttons, add RHS image to the hero
* [#858,site][xl]: make sidebar consistent on all pages
* [site][xs]: fix ts error on GitHub button component
* [site][xs]: fix external links on navbar needing two clicks to open
* [site, hero][xs]: align RHS image to the top
- Fix LineChart and allow the use of URLs
- Add applyFullWidthDirective back
- Fix favicon
- Remove data_1.csv and data_2.csv in favour of data.csv
- Remove vestiges of Vercel
